CN107576906A - A kind of portable relay checking platform and its application method - Google Patents

Abstract

The present invention provides a kind of portable relay checking platform and its application method, including the selecting switch connect, three groups of fuse wires and relay base area connected respectively are sequentially connected with relay-protection tester.The contact converted measurement module for also include platform power module, the resistance measuring module of relay coil both sides being connected to by base, each contact of relay coil is connected to by base.The present invention is met the needs of each model relay checking of various voltage class using all types of special purpose relay bases, directly hindered using digital display ohmmeter direct measurement relay by the use of contact indicator lamp as contact conversion and whether fine or not foundation is judged.The present invention solve the problems, such as to verify present in prior art efficiency it is low, can not rapid verification whole contact and straight resistance measurement, can not to be quickly accurately positioned failure contact, intensity of workers big.

Description

A Portable Relay Calibration Platform and Its Application Method

technical field

The invention belongs to the technical field of automatic devices of hydropower plants, and in particular relates to a portable relay calibration platform and a using method thereof.

Background technique

The relay is an electric control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. Relays are widely used in the control loop of secondary equipment for safety protection, switching circuits, automatic adjustment, and power monitoring. A large number of relays are used in the secondary equipment of hydropower plants, and regular calibration is required to ensure that the status of the relays is normal.

A relay calibration method commonly used at present: use the same type of relay base and relay protection tester for calibration. Relay verification inspection items include: relay coil direct resistance, relay operating voltage, relay return voltage, relay normally open contact, normally closed contact action is normal. In the current process of calibrating the relay, the operating voltage, return voltage and return coefficient of the test relay are all automatically measured by the relay protection tester. However, the relay protection tester can only verify one contact of the relay at a time. However, generally speaking, the number of contacts of the relay is large. If only one of the contacts is verified, the reliability of other contacts cannot be guaranteed. Therefore, it is necessary to verify all contacts of the relay. However, if all the contacts of the relay are to be verified, it is necessary to change the wiring and the related test function settings of the relay protection tester many times to achieve it. Repeated wiring and setting work in the whole process will take a lot of time and bring safety risks. There are a lot of equipment under the jurisdiction of the automatic team, coupled with undertaking more outstation maintenance projects, resulting in a shortage of automatic team members, so how to improve efficiency, reduce workload and working hours in relay calibration needs to be solved by members of the automatic team. There is a need for a relay calibration device that is portable and has high calibration efficiency.

Therefore, on the basis of the existing test equipment that can be used, it is of great practical significance to design an auxiliary device that reduces the workload and working time of traditional relay calibration and can complete all relay calibration items.

Contents of the invention

The purpose of the present invention is to provide a portable relay calibration platform and its use method, which solves the problems of low calibration efficiency, inability to quickly calibrate all contacts, inability to quickly and accurately locate faulty contacts, and labor intensity of staff in the prior art. Big question.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A portable relay calibration platform, including a selector switch connected to a relay protection tester, a plurality of relay base areas of different voltage levels connected to the selector switch, and resistors connected to both sides of the relay coil through the relay base area The measurement module, the contact conversion measurement module used to connect to the contacts of the relay coil through the bottom relay base area, and the platform power supply module used to provide electric energy for the platform power consumption components; the relay base area is provided with a base for connecting the relay ; The contact conversion measurement module includes a normally closed contact indicator light BL for connecting with the normally closed contact of the relay and a normally open contact indicator light KL connected with the normally open contact.

The contact conversion measurement module includes multiple pairs of normally closed contact indicator lights BL and normally open contact indicator lights KL, the positive pole of the platform power module is connected to a normally closed contact of the relay through the contact measurement circuit switch KS and a normally closed contact indicator light BL , the positive pole of the platform power module is connected to a normally open contact of the relay through the contact measurement circuit switch KS, a normally open contact indicator KL, and the negative pole of the platform power module is connected to the common terminal; it is the normally closed contact indicator BL and the normally open contact indicator The positive and negative poles of the indicator light power supplied by KL are introduced from the platform power module.

The selection switch is respectively connected with the DC 24V base area, the AC 220V base area and the DC 220V base area.

Matching blown fuses are arranged between the selector switch and each relay base area.

The resistance measurement module is a digital display ohm resistance meter, and the input terminals of the resistance measurement module are connected to both sides of the relay coil.

The platform power supply module is composed of a switching power supply for providing V power supply.

It also includes a start button for starting the platform, a resistance measurement button for starting the resistance measurement module, and a contact conversion measurement button for starting the contact conversion measurement module.

The base is a plug-in base.

A method for using a portable relay calibration platform, comprising the following steps:

Select the appropriate voltage output terminal of the relay protection tester to connect with the portable relay calibration platform, insert the relay to be calibrated into the base of the corresponding relay base area, and select the corresponding type with the selection switch; start the calibration platform;

Use the resistance measurement module to measure the direct resistance of the relay, and record the direct resistance value of the relay; then enable the contact conversion measurement module, and use the relay protection tester to gradually increase the voltage to the relay coil until the normally open contact indicator KL lights up, and the normally closed contact indicates When the light BL is off, record the action voltage value; finally reduce the voltage gradually until the normally closed contact indicator BL is on, while the normally open contact indicator KL is off, record the return voltage value, if the normally open and normally closed contact indicates If the light BL conversion is not normal, it means that the corresponding contact is a problem contact, record the problem contact, and the single calibration work is over.

Compared with the prior art, the beneficial effects of the present invention are as follows:

The whole platform of the present invention includes a selector switch connected sequentially with the relay protection tester, three groups of fuses and three relay base areas respectively connected with the three groups of fuses, and the contact conversion measurement module mainly has a normally closed contact indicator light. Composed of BL and normally open contact indicator light KL. The calibration platform only needs to be prepared for the cooperation with the relay protection tester, and can quickly and efficiently complete a large number of relay calibration work, and the calibration efficiency is high; the calibration of all contacts can be completed at one time through the contact conversion measurement module Work, embedded digital ohm resistance meter can quickly measure the direct resistance of the relay coil, and can quickly verify all contacts and direct resistance measurement; through the indication of the two sets of lights on the contact conversion measurement module, the corresponding contact can be quickly determined Whether it is normal, you can quickly and accurately locate the faulty contact. The verification platform does not need to change the wiring mode repeatedly and the verification time is fast, thereby reducing the labor intensity of the verification personnel. The environment at the work site is often complex. Through the integrated structural design, it is easy to carry and place, adapts to various on-site work sites, and has strong environmental adaptability.

The use method of the present invention uses the contact indicator light as the basis for judging the contact conversion and whether it is good or bad, uses various types of special relay bases to meet the needs of various voltage levels and models of relays, and uses digital display resistance meters to directly measure relays Straight block. The invention solves the problems in the prior art of low verification efficiency, inability to quickly verify all contacts and direct resistance measurement, inability to quickly and accurately locate faulty contacts, and high labor intensity of staff.

Description of drawings

Fig. 1 is the structural representation of portable relay verification platform of the present invention;

Fig. 2 is the schematic diagram of the contact conversion verification module of the portable relay verification platform of the present invention;

In the figure, 1. Plug, 2. Platform power module, 3. Relay protection tester, 4. Selection switch, 5. Start button, 6. Resistance measurement button, 7. Contact measurement button, 8. DC 24V loop fuse, 9. AC 220V loop fuse, 10. DC 220V fuse, 11. DC 24V base, 12. AC 220V base, 13. DC 220V base, 14. Contact conversion measurement module, 15. Resistance measurement module, 16. Indicator power supply, 17. Contact measurement circuit switch KS, 18. Contact measurement lamp, 19. Relay K1 contact (two pairs of contacts), 20. Relay K2 contact (three pairs of contacts), 21. Relay K3 contact (four pairs of contacts), 22. Relay K1 coil, 23. relay K2 coil, 24. relay K3 coil.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention provides a portable relay calibration platform, as shown in Figure 1, the entire platform is used in conjunction with a relay protection tester 3, including a selection switch 4 connected to the relay protection tester 3, the selection switch 4 is followed by a There are three test circuits, which are DC 24V measurement circuit, AC 220V measurement circuit, and DC 220V measurement circuit, and the circuit selection is performed through the selection switch 4. In the DC 24V measurement circuit, the DC 24V base 11 is connected to the selection switch 4 through the fuse 8; in the AC 220V measurement circuit, the AC 220V base 12 is connected to the selection switch 4 through the fuse 9; Switch 4 is connected.

The platform also includes a contact conversion measurement module 14 connected to each contact of the relay coil through the base, which is activated and deactivated by the contact conversion measurement button 7 . As shown in Figure 2, the contact conversion measurement module 14 includes an indicator light power supply 16 introduced from the platform power supply module. The positive pole of the indicator light power supply 16 is connected to the contact measurement circuit switch KS17, and then connected to the contact measurement lamp 18. The contact measurement lamps include two groups , one group is normally closed contact indicator lights, respectively BL1, BL2, BL3, BL4; the other group is normally open contact indicator lights, respectively KL1, KL2, KL3, KL4. All normally closed contact indicator lamps often closed contacts get back to the indicator light power supply 17 negative poles, and all normally open contact indicator light often open contacts get back to the indicator light power supply 17 negative poles. The contact conversion measurement module 14 is connected to the contact area of the relay K3 by default, and can check four groups of contacts. The other two groups of relay contact areas can also be selected according to the number of commonly used relay contact pairs.

The platform also includes a resistance measurement module 15 connected to both sides of the relay coil through the base, which is activated and deactivated by the resistance measurement button 6 . The resistance measurement module adopts a 2kΩ digital display ohm resistance meter, and the input terminal is connected to both sides of the relay coil. The positive and negative poles of the power supply are drawn from the switching power supply.

The platform also includes a power module 2 and a start button 5 for starting and closing the platform.

The platform also includes a platform power supply module 2, which is composed of a 12V switching power supply, and provides 12V power supply to the contact conversion measurement module 14 and the resistance measurement module 15.

The present invention particularly explains: because there may be many kinds of relay models in the same factory in the automatic device of the hydropower plant, so the relay calibration needs to use a variety of bases. If a traditional base is used on a portable relay calibration platform of the present invention Just can't meet the needs of multiple types of relay inspection, the special base used in the present invention can solve this problem. The bases are divided into three types according to the voltage level, namely DC 24V base, AC 220V base and DC 220 base, respectively inserted into the corresponding DC 24V base area, AC 220V base area, and DC 220V base area. The base is pluggable, the lower part is a fixed pin type, which is used to insert the platform of the present invention and the measurement circuit; the upper part is a special hole type, and the corresponding base can be flexibly selected according to different voltage levels and different types of relays, so that it can be realized conveniently and quickly Calibration work for various relays.

The present invention uses a portable relay calibration platform to cooperate with the method of using a relay protection tester. The specific steps are as follows:

First, connect the voltage output terminal of the appropriate electric protection tester to the portable relay calibration platform, then insert the relay to be calibrated into the corresponding relay base, and turn the selection switch to the corresponding type. After the preparations are done, start the calibration platform, measure the direct resistance of the relay with the resistance measurement module, record the direct resistance value of the relay, and then enable the contact conversion measurement module. At this time, the indicator light of the normally closed contact is on, and the indicator light of the normally open contact is off. Use a relay protection tester to gradually increase the voltage to the relay coil until the indicator light of the normally open contact is on, while the normally closed contact is off, and record the operating voltage value; finally, gradually reduce the voltage until the indicator light of the normally closed contact is on, and the indicator light of the normally open contact indicates If the light is not on, record the return voltage value. If the indicator light of the normally open and normally closed contact does not switch normally during this process, it means that the corresponding contact is a problematic contact. Record the problematic contact, and the single calibration work is over.

The principle of the present invention is as follows: it is assumed that the relay to be verified is a DC 24V relay, including 4 pairs of normally open and normally closed contacts. The first step is to select the corresponding base, insert it into the corresponding DC 24V base area 11 of the platform, and then insert the relay into the base; the second step is to connect the relay protection tester 3 to the platform, and set the selection switch 4 to DC 24V. Power on the platform and the relay protection tester 3; the third step is to press the platform start button 5, and then press the resistance measurement button 6 to measure and record the direct resistance of the relay coil. After the recording is completed, press the resistance measurement button 6 to exit the direct resistance measurement ; The fourth step is to carry out the contact conversion situation measurement after the coil 24 is electrified by the contact conversion measurement button 7. At this moment, the coil 24 is not electrified yet, and the indicator light status is four normally closed contact indicator lights (BL1, BL2, BL3, BL4 bright, four A normally open contact indicator light (KL1, KL2, KL3, KL4 is off. Then select the DC output on the relay protection tester, set the step size to 0.1V, gradually increase the voltage from 0, observe the change of the indicator light 18, when the indicator When the lamp 18 changes, the four normally closed contact indicator lights are off, and when the four normally open contact indicator lights are on, record the voltage value at this time. When the indicator light 18 changes and the four normally closed contact indicator lights are on, and the four normally open contact indicator lights are off, record the voltage value at this time, which is the relay return voltage. In the fourth step, if which pair of contact indicators Lamp 18 does not change according to the above situation, indicating that there is a problem in the replacement of the contact, and the contact is recorded as the problem contact.

The advantages of the present invention are: 1. High verification efficiency. 2 Quickly verify all contacts and direct resistance measurements. 3 Quickly and accurately locate faulty contacts. 4 Reduce the labor intensity of calibration personnel. 5 Strong ability to adapt to the environment.

In a word, a portable relay calibration platform of the present invention includes a selection switch sequentially connected to a relay protection tester, three groups of blown fuses and a DC 24V base area, an AC 220V base area, and a DC 220V base area respectively connected thereto. base area. It also includes a platform power supply module, a resistance measurement module connected to both sides of the relay coil through the base, and a contact conversion measurement module connected to each contact point of the relay coil through the base. The present invention uses the contact indicator light as the basis for judging the contact conversion and whether it is good or bad, uses various types of special relay bases to meet the needs of various voltage levels and models of relay verification, and uses a digital display resistance meter to directly measure the direct resistance of the relay. The invention solves the problems in the prior art of low verification efficiency, inability to quickly verify all contacts and direct resistance measurement, inability to quickly and accurately locate faulty contacts, and high labor intensity of staff.

The above are only preferred embodiments of the present invention, and are not limited to the implementation scope of the present invention. All equivalent changes and modifications made according to the scope of the present invention shall fall within the technical scope of the present invention.

Claims (9)

1. a kind of portable relay checking platform, it is characterised in that the selection including being connected with relay-protection tester (3) is opened Close (4), with selecting switch (4) connect multiple different voltage class relay base area, for passing through relay base area It is connected to the resistance measuring module (15) of relay coil both sides, for being connected to relay coil by bottom relay base area The contact converted measurement module (14) of each contact and the platform power module (2) for providing electric energy for platform consuming components；Institute The base for connecting relay is provided with the relay base area stated；Described contact converted measurement module (14) includes using The normally closed contact indicator lamp BL being connected in the normally closed contact with the relay and normal opened contact indicator lamp KL being connected with normal opened contact.

2. a kind of portable relay checking platform according to claim 1, it is characterised in that described contact conversion is surveyed Amount module (14) includes multipair normally closed contact indicator lamp BL and normal opened contact indicator lamp KL, and platform power module (2) positive pole is through connecing Point measuring loop switch KS, a normally closed contact indicator lamp BL are connected to a normally closed contact of relay, platform power module (2) Positive pole is connected to a normal opened contact of relay, platform electricity through contact measuring loop switch KS, a normal opened contact indicator lamp KL Source module (2) negative pole is connected to common port；The indicator lamp of electric energy is provided for normally closed contact indicator lamp BL and normal opened contact indicator lamp KL Power supply (16) both positive and negative polarity introduces from platform power module (2).

A kind of 3. portable relay checking platform according to claim 1, it is characterised in that described selecting switch (4) it is connected respectively with direct current 24V basal seat areas (11), alternating current 220V basal seat area (12) and direct current 220V basal seat areas (13).

4. a kind of portable relay checking platform according to claim 1 or 3, it is characterised in that described selection is opened Close and be provided with the fuse wire to match between (4) and each relay base area.

A kind of 5. portable relay checking platform according to claim 1, it is characterised in that described resistance measurement mould Block (15) is digital display Ohmic resistance table, and the input of resistance measuring module (15) is connected to relay coil both sides.

A kind of 6. portable relay checking platform according to claim 1, it is characterised in that described platform power mould Block (2) is made up of Switching Power Supply, for providing 12V power supplys.

7. a kind of portable relay checking platform according to claim 1, it is characterised in that also include flat for starting The start button (5) of platform, the resistance measurement button (6) for starting resistance measuring module (15) and startup contact converted measurement module (14) contact converted measurement button (7).

8. a kind of portable relay checking platform according to claim 1, it is characterised in that described base is plug Formula base.

9. the application method of the portable relay checking platform in claim 1 to 8 described in any one, it is characterised in that Comprise the following steps：

Suitable relay-protection tester (3) voltage output end is selected to be connected with portable relay checking platform, by needed for The base in the corresponding relay base area of relay insertion of verification, by type corresponding to selecting switch (4) selection；It is flat to start verification Platform；

With the straight resistance of resistance measuring module (15) measuring relay, the straight resistance of meter relay；Then enable contact converted measurement Module (14), voltage is stepped up to relay coil with relay-protection tester (3), until normal opened contact indicator lamp KL bright, And normally closed contact indicator lamp BL does not work, operation of recording magnitude of voltage；Finally progressively reduce voltage, until normally closed contact indicator lamp BL It is bright, and normal opened contact indicator lamp KL does not work, and records return voltage value, if normally-open normally-close contact indicator lamp BL turns in the process Change abnormal, then it is problem contact to illustrate its corresponding contact, records the problem contact, so far single verifying work terminates.